Yes, there are. I personally think that they'll be overcome.
Those are playing out right now in the courts in B.C. For example, money from an investment fraud was placed in the trust account of a lawyer, Mr. Pelletier, who's been disbarred for money laundering— and I love the irony of that—so there's a UWO: Where did that money come from?
The first challenge is that this is a civil liberties issue, but Cullen's report said that on balance, when it comes to these things, it is charter-proof. It will survive a charter challenge.